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Impact of Tannin Structure on Chemical Properties of Tannin.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Impact of Tannin Structure on Chemical Properties of Tannin./
Author:	Mallikarachchi, Sadeepa Yuganthi.
Description:	1 online resource (88 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-07, Section: B.
Contained By:	Dissertations Abstracts International85-07B.
Subject:	Chemistry. -
Online resource:	click for full text (PQDT)
ISBN:	9798381401493

Impact of Tannin Structure on Chemical Properties of Tannin.
Mallikarachchi, Sadeepa Yuganthi.

Impact of Tannin Structure on Chemical Properties of Tannin. - 1 online resource (88 pages)

Source: Dissertations Abstracts International, Volume: 85-07, Section: B.

Thesis (Ph.D.)--Miami University, 2023.

Includes bibliographical references

Tannins are plant secondary metabolites belonging to the larger group of plant polyphenols. Polyphenols have many desired nutritional and health benefits such as antimicrobial, anticarcinogen, anti-inflammatory activities as well as popular antioxidant activity to offer. Tannins are unique polyphenols because of their high affinity for protein and ability to precipitate protein under favorable conditions. Throughout this work, the association of tannin with tannin and tannin with protein is studied. Part of this dissertation focuses on tannic acid, which is commercially produced as a mixture of different chain length gallate esters. Many published studies have assumed that tannic acid is a pure single compound, ignoring the true structural and chemical diversity of this material. In this work, the overlooked compositional diversity of different supplies of tannic acids is highlighted. This work addresses that knowledge gap by coating zein protein nanoparticles with compositionally different tannic acids and then characterizing their structure and function using analytical tools such as RP-HPLC to characterize tannin acids, DLS to determine particles size and polydispersity, zeta analyzer for zeta potential, electrophoresis for digestibility experiments, FT-IR to investigate bond formation, SEM to confirm sizes and aggregation patterns and circular dichroism to investigate secondary structure changes of zein protein. This work highlights the need to acknowledge and explore the compositional diversity of tannic acid to achieve its full potential as coating material in nanotechnology work. An additional set of studies that explore the self-association of condensed tannin are described here. As a result of this work, it is proposed that aggregation is a phenomenon that stands in the way of effective use of chromatographic techniques to characterize condensed tannins. Dynamic light scattering (DLS) was extensively used in this work. The data lead to the idea that understanding the nanoparticle nature of both tannin-tannin and tannin-protein complexes is crucial to proper application of tannins in the fields of biomedical science, climate science, agricultural science and the food industry to yield full benefits of tannins and tannin related complexes.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798381401493Subjects--Topical Terms:

593913
Chemistry.
Subjects--Index Terms:

TanninsIndex Terms--Genre/Form:

554714
Electronic books.

Impact of Tannin Structure on Chemical Properties of Tannin.
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